It differs from person to person. My grandfather lived 10 years with cancer It started in his lungs and spread to his lymph nodes.
There is no person that can tell you exactly how long you (or anyone) will live. That is in God's hands. None of us are promised our next breath. You could outlive me. The best thing for each of us to do is to make sure we are right with our God and our family and friends. Do not begin the day expecting to die, begin your day with the attitude that you are going to make the best day possible out of the hours you have. Each of us should make sure our affairs are in order...will, power of attorney etc. That is just good sense. Best of luck to you, friend.